Portable rivet heading tool



April 1942. A. E. R'YLANDER 2,278,741

PORTABLE RIVET READING TOOL Filed Dec. 1, 1959 1 INVENTOR. fi/vpezwIPYl/QA/Dff ATTORNEY.

Patented Apr. 7, 1942 PORTABLE RIVET HEADING TOOL Andrew E. Rylander,Detroit, Mich., assignor to The Midland Steel Products Company,Cleveland, Ohio, a corporation of Ohio Application December 1, 1939,Serial No. 307,142

4 Claims. I (CI. 78-19) This invention relates to new and usefulimprovements in rivet heading tools of the mobile or portable type whichare too heavy to be manually supported by the operator.

An important object of the invention is to provide means for suspendingsuch tools with the mouth of the jaws thereof disposed in proper workingposition to engage the work.

Another important object of the invention is to provide a heavy portabletool operated by a hydraulic cylinder which is arranged with respect tothe tool so that the heavy mass represented by the combined weight ofthe tool and cylinder can be supported in balanced condition with itsjaws in a certain plane whereby it can be readily moved by the operatorand operated at all angles without moving the work and with a minimum ofeffort.

Other objects and advantages of the invention will become apparentduring the course of the following description.

In the accompanying drawingforming a part of the application and whereinlike numerals are employed to designate like parts throughout theseveral views.

Fig. 1 is a perspective view of one form of the tool and suspensionmeans.

Fig. 2 is a similar view of another form of riveting tool and suspensionmeans.

The portable type of rivet heading tool illustrated in the drawing hasbeen found advantageous in the manufacture of heavy products, such asautomobile frames, requiring the use of many cold headed rivets to holdparts thereof together. These frames require the heading of bothvertical and horizontally disposed rivets and the riveting tool is somounted as not to require moving, tilting or turning of the product andthe minimum movement of the tool to achieve speed of production.

Referring now more particularly to the drawing and to Fig. l, thenumerals l and 2 designate a pair of relatively movable jaws havingsubstantially parallel gripping portions 3 and 4 respectively, providedwith rivet sets and 6. These jaws are very heavy and sturdy to withcstand high hydraulic riveting pressures. The

upper jaw 2 is provided with a pair of depending integral parallel legs1 and to which is fulcrumed a leg 8 integral with the lower jaw, bymeans of a fulcrum pin 9. The rear end of the lower jaw I is providedwith a rearward longitudinal extension H1 in the same plane with the jawportion 3 and the upper jaw 2 is provided with a broader rearwardlongitudinal extension ll substantially parallel to the extension III ofthe lower jaw when the jaws are in closed position. This extension H isprovided with an opening extending through its upper and lower faces toreceive a reduced integral extension of a hydraulic cylinder I2 which isprovided with flexible hose connections l3 and I4 for the inlet andoutlet of fluid from a high pressure pump or other suitable source. Thereduced portion of the cylinder is rigidly fastened in the opening ofthe extension, thereby disposing the cylinder normal to the jaw. Thiscylinder is provided with a pair of vertically spaced later-allyextending arms l5 to which a vertical hand grip I6 is secured, wherebythe tool may be manipulated. An electric push button I! is provided inthe upper end of the hand'grip to make and break a circuit throughconductors l8 for controlling a valve, not shown, for admitting liquidunder pressure to the hydraulic cylinder l2 for operating the jaws ofthe tool.

The ram of the cylinder is designated by the numeral l9 and extends fromthe cylinder and underside of jaw 2 toward the extension ill to engagean abutment piece or socket member on the latter. The ram or plunger l9has secured thereto an enlargement 2| aswide as the extension I!) of jawI, so that a pair of links 22 may be pivotally connected thereto attheir upper ends as at 23 to be arranged upon opposite sides ofextension In. The lower ends of these links 22 are slotted as at 24 toreceive pins 25 projecting from opposite sides of extension I!) so thatretraction of the ram plunger I9 will automatically open the jaws 3 and4. Upon projection of the ram plunger l9'toward the jaw extension III,the slots 24 will permit the lower end of the plunger to engage thesocket member 20 of the lower jaw andmove the jaw ends 3 and 4 togetherto cold head a rivet under terrific pressure. A second handle 26 mayproject longitudinally from the rear end of jaw extension ID tofacilitate handling of the tool.

For suspending and supporting the weight of the tool so that the jawportions thereof will be normally disposed in a substantially horizontalposition, a U-shaped balancing bracket 2'! embraces the three squaresides of jaw extension II and is secured thereto by means of screws 28.The free ends 29 of the two arms of this U-shaped bracket are upwardlyand angularly disposed as well as being perforated substantially abovethe fulcrum 9 to receive a horizontalpin 30 which passes through a block3| or trunnions projecting from opposite sides of the block 3|. Thisblock is divided as shown and is provided with a ball-shaped socket toreceive the spherical end 32 of a vertical stud 33 extending through alongitudinally extending slot in a sleeve 34 to be pivotally connectedtherein on a horizontal axis 35. The two ends of an enlarged somewhatdiamond-shaped loop 36 are aligned and bent inwardly toward each otherand are inserted into opposite ends of the sleeve 34 thereby forming asecond horizontal axis upon which the tool and mounting may swing orroll in either direction as shown by the arrow to dispose the hydrauliccylinder |2 partially extended through the loop 36 or arranged beneathit with thejaw portions 3 and 4 disposed substantially vertically forheading a horizontally disposed rivet. The entire ap paratus issuspended from a cable 31 wound upon the usual commercial spring balancereel 38', which may be suspended from a carriage of a monorail so thatthe tool can be readily moved lengthwise of the article being rivetedwith the minimum exertion on the part of the operator. Due to theprovisions of the ball and socket joint, it will be appreciated that theriveting tool may be swivelled about a vertical axis without twistingthe cable 3'! and the tool may be swung in a small are upon itshorizontal axis 30 or than a larger arc in the direction of the arrowshown in Fig. 1 upon either the axis 30 or the axis of the inwardlydirected ends of the loops 35. Lateral swinging movement of the tool isalso permissible upon the ball or axis of pin 35. It will thus beapparent that the riveting tool is universally suspended fromapproximately the center of balance of the mass composed of the twopivoted jaws and the hydraulic cylinder l2. As this combined mass weighsbetween 50 and '75 pounds, it would be extremely diflicult, if notimpossible, for the operator to handle the riveting tool without anymeans of support for any length of time without fatigue, and productionwould be materially curtailed. However, with the suspension hereinillustrated, the riveting tool may be handled with the facility of ahalf-pound object and may be operated to cold head three-eighth inchrivets almost as fast as the operator can move has thumb or index fingertogether and with the same kind of action. The closing of the jaws iseffected by hydraulic action by simply depressing the push button andjaw opening is efiected by mere release of the push button.

In the modification shown in Fig. 2, an operators hand is shown indotted lines holding the riveting tool against the action of gravity tohead a vertically disposed rivet. The normal suspended i position of thetool is swung down from the position shown in Fig. 2, upon thehorizontal axis 30 to dispose the rivet heading portions 3 and 4 of thejaws in a substantially horizontal position. In this modification thereis provided a lower jaw 40 having a right angular extension 4| and anupper portion 42 disposed at an obtuse angle to the shank portion 4| forsupporting the hydraulic cylinder I2 with its axis at an angle to thejaw portion 3 so that the ram plunger I9 is disposed at an angle otherthan normal to a jaw 43. This jaw has its inner end bifurcated andfulcrumed to the extension 4| by means of fulcrum 44. Adjacent the freeend of jaw 43 in its upper surface, is provided a seat or cavity 45 toreceive the free end of the ram plunger for delivering maximum pressureto close the jaws. The ram I9 is provided with an enlargement 2| forconnecting the pair of links 22 to the movable V jaw that it is openedupon retraction ofthe' ram plunger. The construction of these links 22is the same as in the preceding form of invention.

For suspending this tool, a U-shaped balancing bracket 46 similar to thebracket 21 is provided and is secured around the extension 42 of the jaw40 so that its free ends extend considerably behind the extension 4|,whereby the combined weight of the hydraulic cylinder l2 and the jawswill move the tool by gravity in the direction of the arrow in Fig. 2 todispose the jaws in substantially vertical planes for headinghorizontally disposed rivets. The tool is suspended from a pair of links47 connected to the axis 30' and these links are in turn fulcrumed on ahorizontal pivot 48 to a block 49 having a second pin 50 extendingtherethrough at right angles to the pin 48 for connecting a U-shapedbracket 5| thereto. A cable 53 is swivelly connected to the bracket 5|for supporting the weight of the tool and this cable is wound upon theusual counterbalance Wheel 38'.

' It will thus be apparent that the modification shown in Fig. 2 can beswung upon the axis 30' to head rivets which are disposed bothvertically and horizontally and that the entire tool can also be swunglaterally to difierent angles upon the axis 50 while the whole tool canbe turned about the axis of cable 53. If desired, the jaw 43 may as analternative be provided with an additional handle 54 having a pushbutton associated therewith to operate a solenoid valve by means of theconductor 55, for controlling fluid under pressure to the hydrauliccylinder |2 when the tool hangs by gravity in its normal position withthe jaws 3 and 4' disposed substantially horizontally.

It will of course be understood that various changes in the size, shapeand arrangement of parts may be resorted to without departing from thespirit of the invention or the scope of the appended claims.

' I claim:

1. A hydraulic rivet heading tool comprising a pair of jaws, a hydraulicram cylinder securely mounted upon one jaw and having its ramcooperating with the other jaw, a balancing bracket secured to one ofsaid jaws and having a horizontal fulcrum, a member mounted upon saidfulcrum, a stud swivelly connected to said 'member, a sleeve pivotallyconnected to said stud, and a suspension loop having its ends bentinwardly and rotatably mounted in the ends of said sleeve.

2. A hydraulic rivet heading tool comprising a relatively stationaryC-shaped jaw, a movable jaw pivotally connected to the C-shaped jaw, ahydraulic cylinder rigidly mounted on the C- shaped jaw and having a ramengaging the movable jaw to power close the jaws, linkage connecting theram and said movable jaw to cause the same to open during retraction ofthe ram, a balancing bracket secured to the forward end of the C-jaw andextending beyond the rear end and having a horizontal pivot arrangedrearwardly of the C-jaw, and means for suspending the jaw from saidhorizontal fulcrum at a point substantially above the center of gravityof the combined weight of the jaws and hydraulic cylinder.

3. A hydraulic riveting tool comprising a pair of riveting jaws, a pairof parallel arms secured to one of said jaws, said arms having free endsprojecting beyond said jaws, a horizontal pivot extending between thefree ends of said arms and disposed substantially above the center ofgravity 5 pin.

yond said jaw, a horizontal pin connecting the free ends of said armsand disposed substantially above the center of gravity of the tool, andsuspension means associated with said horizontal ANDREW E. RYLANDER.

